Cornice-bending machine



3 Sheets-Sheet 1A A. O. KITTREDGE & G. A. OHL.

(No' Model.)

GORNICE BENDING MACHINE.

Patented Mar. 16, 1886.

(No Model) 3 Sheets-Sheet 2.

A. 0. KITTREDGE & G. A. OHL. I

GORNIGE BENDING MACHINE.

[111/ info/e /0 m m" C J T C I n Paten-tedMar. 16, 1886.

1 I l l l l l I.

o 6 fig (No Model.) '3 SheetsSheet"3. A. 0. KITTRE DGE 85 G. A. OHL.

OORNIGE BENDINGMAGHINE. No. 338,079. Patented Mar. 16, 1886.

u. PETERS, mwmm Wadfingion, ac.

NITED STATES PATENT OFFIQE.

ANSON O. KITTREDGE, OF SLATE HILL, NEW YORK, AND GEORGE A. OHL, OF NEWARK, NEWV JERSEY; SAID KITTREDGE ASSIGNOR TO GEORGE A. OHL, JR, OF NElVARK, NEW JERSEY.

CORNICE-BENDING MACHINE.

3?1GO'IPICSJ-VIIOH forming part of Letters Patent No. 388,079 dated March 16, 1886.

Application filed June 15, 1585. Serial No. 168,705. (No model.)

To aZZ whom it may concern:

Be it known that we, ANSON O. KITTREDGE and GEORGE A. OHL, citizens of the United States, residing, the said KITTREDGE at Slate Hill, Orange county, and State of New York, and the said OHL at Newark, Essex county, New Jersey, have invented certain new and useful Improvements in Cornice-Bending Machines, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention is applicable to any machine provided with clamping-j aws to hold the metal during the bending operation, and having a so-called turning leaf ormembersnpported upon pivots at the ends and operated adjacent to the joint of the clampingleaves to bend the clamped metal.- Such machines are at present made in a variety of forms, and the invention is represented herein as applied to that class of machines in which one of the clamping leaves is arranged movably above the other, with the turning-leaf hinged before the joint of theclamping-leaves.

Our improvements consist, partly, in combining with the movable member of such clamping'leaves a cylindrical former adjusted concentrically with the turning leaf, and in providing the face of the turning leaf with a movable slide or wiper adjustable to the said former to wipe the sheet metal around its periphery through any desired are.

Our improvementsalso consist in meansfor moving the upper leaf vertically and transversely, and in a construction for the turningleaf whereby its inner edge is cut baclrfrom the turning center to admit concentric formers attached to the movable clamping-leaf; in a movable plate applied to the front side of 0 the bottom leaf, and in auxiliary patterns or shapes applied to the front corner of the lower leaf to operate in conjunction with the rear side of the former.

1n the drawings annexed, Figure 1 is a front 5 elevation of a machine providedwith certain of our improvements. Fig. 2 is an end elevation of the same. Fig. Sis asecti'onof an upper leaf, a lower leaf, and turningleaf constructed with the devices for concentric'bending. Fig.

4 is a transverse section of the same leaves on line 00 0c in Fig. 1, showing the guide and the application of the adjustable turning-plate t0 the formation of square bends. Figs. 5 and 6 are sections of shapes for use upon the front corner of the lower leaf, and Fig. 7 is a plan of the machine shown in Fig. 1.

A is the lower leaf; B, the frame or legs of the machineto which it is rigidly secured; O, the vertically movable upper leaf; D, the turning-leaf, provided with a slide or wiper, D, upon its outer face, and hinged in the usual manner upon pivots D".

E are vertical guide -pins secured to the lower leaf near its ends, and E are boxes adapted to slide thereon, and fitted by means of suitable flanges, a, to slide in slots F, formed transversely in the upper leaf near its ends.

Screws F are inserted transversely in the leaf through the slots F, nuts or threads being formed in each box IE to fit the same. G is a longitudinal shaft. mounted in bearings 1/ upon the rear side of the leaf 0, and G are gears for turning the screws simultaneously by means of the shaft G and a handle, G", thereon.

The leaf 0 is raised and lowered upon the guide-pins E by a connection, T, to a treadle,

T, the latter being attached to a treadle'shaft,

T beneath the lower leaf, and opera-ting to raise the upper leaf when depressed by means of cranks T attached to the connections T and secured upon the opposite ends of the treadleshaft. A counter-balance, U, is applied to the shaft T opposite the treadle T. The weight of the upper leaf then operates to close it upon the sheet metal when laid upon the lower leaf, while the treadle operates to lift the leaf when it is desired to remove or to shift the metal between the clamping-surfaces.

To clamp the upper leaf firmly to the lower one, so as to rigidly hold the metal during the 0 bending operation, I provide the upper leaf with independent clamping-wedges, inserted, when required, into mortises h, formed transversely in the guide-pins E above the top of the leaf when depressed. H H are the wedges, fitted to the mortises h, formed in the upper part of the guides E, and H is a lever pivoted upon the top of the upper leaf, and having the two wedges pinned to it at opposite sides of the fulcrum, as at H, so that the movement of the lever operates to withdraw both the wedges from the slots at the same time. The outer edges of the slots F are made higher, as at s in Fig. 1, than the inner edges, at t in Fig. 7, so that only the.

outer points of the wedges operate to hold the lea f0 downward. By this construction, when the leaf is clamped, the outer ends of the wedges, being forced upward, tend to press justed transversely in the slots F by the screws F.

A is a movable slide,affixed to the front of the leaf A by meansof bolts Z, (see Fig. 3,) whose heads are fitted in slots in the slide.

\ Screws w are fitted to lugs an at opposite ends of the slide, and serve to adjust the upper corner of the slide in contact with the under side oft-he upper "leaf whenrequired, the upper edge of the slide then forming the front corner of the leaf A, and operating to clamp the sheet metal at at that point when it is desired to hold the metal so close to the turning center.

' The center of the turning-pivots D is shown herein on a level with the surface of the leaf having, therefore, half of its body projecting below the joint of the two clamping-leaves. The inner quarter ofits lower half thus projects from the turning center toward the front corner of the body of the leafA, which in our' construction is formed sufficiently remote from the turning center to clear the largest intended islaid upon the lower leaf and projected from its front edge to be bent. The wiper D is shown secured upon the leaf D in contact with the sheet metal upon the former V, and as the depression of the upper leaf to clampthe sheet metal operates to bend the metal downward over the front corner of the leaf A, it

is obvious that the projecting part of the.

in this position in contact with the under side of the former V, it is obvious that the wiper operating concentrically about the former,

as shown by the dotted lines b in Fig. 3,would' bend or wipe the metal accurately around the former and produce at'a single operation the threequarter bend shown in the figure.

To press the metal into close contact with the rear side of the former,a shape, 0, is shown inserted before the corner of the leaf A and adjusted at the proper height by the slide A, as shown in'Fig. 3. Such shape is shown detached at 0 in Fig. 5, and is intended to press the metal into a right angle at the rear edge of the former; but should it be required to join the curve around the former with the flat part of the metal in by a curve instead of an,

angle, a shape (as 0 in Fig. 6) of'ogee form or other suitable contour may be applied to the front corner of the leaf A, and sustained in the proper relation to the former upon the upper leaf by means of the slide A.

By the transverse adjustment provided for the upper leaf in the boxes E and screws- F" it is obvious that any former attached to the upper leaf may be adjusted in the proper relation to the turning-pivots, the former being adjusted vertically'iipon the face of the upper leaf by means of slots dand bolts d,or any equivalent means. To permit the insertion of such formers in the center of the turningleat, the edge of the latter is cut away, as at c, to clear the same, the wiper D beingused alone to bend the metal around the former. With such construction it is obvious that the wiper produces a continuous application of I the sheet metal to the entire surface of the former throughout the given are, and thus secures an exact conformity of the metal to the former employed.

The turning-leaf is provided, as usual, at

each end with a lover, J, having a counter are not claimed herein, but in aco-pending application of Geo. A. Oh], filed June 15, 1885, as No. 168,698.

The slide or wiper D is very readily ad.- justed to the exterior of the concentric for: mer, whatever its. size, when the former is set in its operativepositiomand the slide or wiper around the former by hand, as isofte'n done in other machines. It is, however, obvious. that; the particular arrangement of the former shown in Fig. 3 enablesns to produce a bendin'cluding three-quartersor more of an entire-circle with one clamping. of the metal between the leaves and one actuation-of the turning-leaf. The adjustable slide upon the front of the turning-leaf may also be utilized to form square or angular bends at different distances from'the front edge of the clamping-leaves. Thus we have shown in Fig. 4a rectangular former,W, projected froni the front of the leaf (3, to form by successive operations a small square channel in the edge of the sheet metal, the adjustability of the slide D affording the means to set the slide in the required position to fit squarely against the front of the wiper, whatever its projection beyond the turning center. The slide is shown in this figure provided with a widened end, D to fit such a flat former, and the sheet metal is shown at f, after having been bent twice at right angles by successively bending the angle near the edge of the sheet, unclamping the metal and moving it forward, clamping it again, and then making the second bend, the projecting edge of the former affording the meansto turn the edge of the metal backward toward the leaf 0, as shown in the figure. At m in the same figure is shown in dotted lines the appearance of the metal when similarly bent into a larger channel.

At )2 in Fig. 4 is shown a gage, which may be applied to either the upper or lower leaf, for setting narrow pieces of sheet metal in the required position between the clampingleaves, two such gages being indicated in Fig. 1 near opposite ends of the bottom leaf.

n is a slot formed in the bottom leaf for the foot of the gage, the latter being shown slotted and provided with a screw and nut, a, to clamp it in the desired position.

The gageitself is shown merely as a pin projected above the surface of thelower leaf, and requiring a slot, 0'', formed in the upper leaf to admit it when the leaves are closed. vIt thus intersects thejoint of the leaves, so as to touch the rear edge of the sheet metal when inserted therein and to set it in the desired position.

From the above description of the nature and operation of our invention it will be seen that any machine will perform the principal functions of our invention, which has a wiper hinged rigidly to fixed bearings, and having clamping-jaws to hold the sheet metal, and a cylindrical former held concentric with the pivots of the turning-deaf.

The improvements relating to the arrangement of the former and turningleaf may 0bviously be adapted to machines in which the lower leaf is movable instead of the upper, or in which the clamping-jaws are arranged side by side, so as to have vertical clamping-faces.

\Ve are aware that it is common in such machines as are shown in United States Patent No. 150,476, issued May 5, 1874, for bending ea-ves-troughs, to swinga wiper around a cylindrical former against which the edge of the metal is held by cams, and we do not therefore claim a wiper and a cylindrical former, broadly; but we are not aware that any machine has been constructed with clamping-jaws between which asheet of metal could be pushed continuously forward and held at any desired point adjacent to a turning-leaf, and having a turning-leaf provided with a wiper adapted to fit concentric formers of various sizes. In such a cornice-bending machine it is very desirable thatlthe machine may be used for making square and angular bends, as well as curves, in the edges of sheets of metal, and the formers and wipers to be used in forming curves must therefore be readily removed and exchangeable for other shapes adapted to effeet the other uses for which the machine is intended. .The essential part of our improvement is therefore such a construction that a machine which is adapted to clamp the sheet metal close to the turning center for making square and angular bends may be readily provided with formers concentric with the same center, so as to produce exact cylindrical forms.

The slide A, affixed to the front of the fixed leaf A, is adapted in practice to fit close up against the front corner of the movable leaf 0, and to clamp the sheet metal as near the center of the leaf D as is required when making angular bends in the sheet metal, the leaf 0 being first adjusted with its front corner at the desired point,(relative to the turning cen ter,) and the upper edge of the slide A being then constructed to coincide with it, or provided with a fiat-topped piece or shape to fit in the desired manner.

We are aware that it is not new to apply a gage to sheet-metal-bending machines, and therefore disclaim such a gage unless fitted to opposite grooves, asshownlherein, the slot a receiving the gage in one leaf, and the slot '1- permitting it to enter the other leaf as the latter is closed to clamp the metal in contact with the gage.

Having thus described our invention,what we claim is 1. The combination,in a cornice-bending machine,of two clamping-leaves movable in relation to one another to clamp the sheet metal and constructed with flat faces, so that the metal may be fed forward between them, a turningleaf cut back from the axial line to admit a concentric cylindrical former, and a movable slide or wiper upon the side 'of said turning-leaf and adjustable to fit a variety of such cylindrical formers, substantially as herein shown and described.

2. The combination, in a cornice bending machine, of two clamping-leaves movable in relation to one another to clamp the sheet metal, a concentric cylindrical former on the movable clamping-leaf,aturning-leaf cut back from the axial line to admit the cylindrical former concentric thereto, and a slide or wiper upon the side of the turning-leaf and fitted to said cylindrical former, as and for the purpose set forth.

3. The combination, in a cornice-bending machine, of two clamping-leaves movable in relation to one another to clamp the sheet metal, a turning-leaf cut back from the axial line to admit a concentric cylindrical former,

machine, of two clamping-leaves movable inrelation to one another to clamp the sheet metal, a concentric cylindrical former on the movable clamping-leaf, a turning-leaf cut back from the axial line to admit said concentric former, and a movable slide, A, upon the front of the fixed clamping-leafA,with a shape applied to its upper edge to co-operate with said former, substantially as and for the purpose set forth.

5. In a cornice-bending machine, the (mbination,with the turning-leaf D and the fixed leaf A, having an adjustable slide, A, upon its front side next the turning-leaf, of a movable clamping leaf, 0, holding a former, a shape upon the adjustable slide A to co-operate-with the under side of the former, and mechanism operating substantially as described for pressing theclamping-leaf and former toward the fixed leaf and shape, so as to bend the metal before operating the turning-leaf, substantially as herein set forth.

6. In a cornice-bending machine constructed with upper and lower leaves having horizontal clamping-faces, the combination, with the lower leaf, of vertical guides affixed thereto, boxes upon the upper leaf fitted to such guides, and means, as screws F, for adjusting the upper leaf upon the boxes transversely in relation to the lower leaf, as and for the purpose set forth.

7. Inacornice-bendingmachineconstructed with upper and lower bending-leaves having horizontal clamping-faces and a turning-leaf pivoted before the joint of such faces, the combination,with the lower leaf, of vertical guides upon said leaf, vertically movable boxes fitted to said guides and to transverse slots formed in the'upper leaf, and screws applied to the said boxes and provided with connecting. gears, and a shaft mounted upon the upper leaf to adjust the upper leaf transversely upon said boxes, substantially as and for the purpose set-forth. I

8. In a cornice-bending machine, the means i for locking the clampingleaves together upon the sheet metal, consisting in the guides attached near opposite ends to the stationary lower leaf and passing through the upper leaf,

the slots h in the upper ends of said guides, and wedges H, fixed movably upon the upper leaf and operated by a hand-lever to force them into the slots 71, substantially as shown and described.

9. The combination,with the leaf A, having vertical guides provided with slots across their upper ends to receive locking-wedges, and

with the upper leaf, 0, provided with vertical openingsfitted -to said guides, of the handlever H, pivoted upon the upper leaf, the wedges H, operated thereby, and the inclined seats 8 upon the leaf 0, operating to throw the outer ends of the wedges upward and to press their inner ends downward, as and for the pur- 7 pose set forth. 10. The combination, with the upper and lowerleaves of acornice-bending machine, and

means forclamping them onto the sheet metal,

of a former applied to the upper leaf and projeeted below the clamping surfaces of the leaves, as set forth, and a shape applied tothe corner of the lower leaf to cooperate with the former upon the upper leaf, substantially as tion, with the lower and upper leaves, A and O,'of the opposite slots, n and r, formed in such leaves, and the gage n, secured in. the v slot n by the screw n, passed through the leaf A,'with its clamping-nut beneath the same and projecting into the slot 1 when the leaves are clamped together, substantially as shown anddescribed.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

ANSON o. KITTREDGE. GEO. A. OHL. Witnesses:

C. O. TAINTOR,

THOS. S. CRANE, HENRY J. THEBERAZEH. 

